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A researcher wishes to test the claim that the average cost of tuition and fees at a 4-year college is more than $6000.She selects a
A researcher wishes to test the claim that the average cost of tuition and fees at a 4-year college is more than $6000.She selects a random sample of 64 colleges and finds the mean to be $6100.The sample standard deviation is $459.Is there evidence to support the claim at = .01?
Step 1: Hypothesis
Step 2: Critical value and acceptance-range
Step3: Compute test-value(calculated z)
Step 4: Accept or reject (ALWAYS EXPLAIN WHY YOU ACCEPT OR REJECT)
b) Construct a 95% confidence interval.
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